hydrogen and oxygen are both gas at room temperature, so how do they form a liquid i.e water, when combined?

Answer 1

You say, when they are combined. Depends what you mean by combined. If you just mix them, they don't make water. The only way they do that is if you ignite the H in the O. When that happens, a chemical reaction takes place which forms a totally new substance,water, which happens to be liquid at room temperature.

Answer 2

Hydrogen and oxygen are both gases at room temperature because their molecules (H2 and O2 respectively) are too light and have too little mutual attraction to be liquids. When Hydrogen is burned and combines with oxygen to form water (H2O), however, the result is a liquid. Although water molecules are lighter than those of many gases, they are strongly polarised and thus stick to each other a bit like magnets do. This is why water, with a molecular weight of only 18 is a liquid, while propane with a much larger molecular weight of 44 is still a gas at room temperature & pressure.

Answer 3

Hydrogen, oxygen and water (vapor) can be a gas at room temperature. Actually hydrogen and oxygen are diatomic gases and travel in pairs (molecules) of H2 and O2 at room temperature. Hydrogen, oxygen and water (vapor) can all be turned into liquids at low enough temperatures. At atmospheric pressure, water condenses from steam at 212 degrees F and its vapor pressure will remain at 100% relative humidity as more vapor condenses to normal room temperature. We call hydrogen and oxygen gases because they are normally gas at room temperature and we call water a liquid because only a small amount of the water is vapor at room temperature. The amount of water that is vapor at room temperature is the same amount within the "vacuum" above a jar of canned tomatoes. Water molecules have an affinity for one another and even form a "skin" at the surface of the water called surface tension. It is strong enough to form raindrops into near-perfect spheres as they fall. Gases have far less affinity for each other and less energy (room temperature) is enough to keep them bumping into each other because the absolute temperature of the gas is a measure of the average velocity of the gas molecules. Jupiter is made up mostly of hydrogen. Some is gas, most is liquid and a lot of it is solid at the center. Most substances exhibit four phases or states (solid, liquid, gas, and ionized plasma) depending on temperature and pressure. Good question.

Answer 4

Water is a molecule that has H connected to O. because O pulls electrons in the route of it very problematic, the H has a partial functional (+) can charge and the O has a partial unfavourable (-) can charge. The attraction between those 2 may bring about an attraction between 2 molecules it somewhat is of the order of one million% almost as good as an finished chemical bond - it really is named a hydrogen bond. The better-than-ordinary attraction between water molecules has a tendency to carry them again from volatilising into the gasoline section, so it remains as a liquid. nevertheless, the attraction between molecules is satisfactorily good that once they are contained in the gasoline section, they combine to make a liquid. info of the tendency of hydrogen bonding to opt for drinks is clear in ethanol (C2H6O) and dimethyl ether (C2H6O). inspite of the reality that they have got an identical mass (making them both complicated or worry-free to flow the gasoline section, ethanol has a a lot more beneficial boiling aspect (of approx seventy 8 tiers C) relative to dimethyl ether (approx 30 C[?]). it really is because the O is hooked as a lot as a H in ethanol and is only connected to 2 C's in dimethyl ether. So ethanol can hydrogen bond and dimethyl ether can not (because O can not create a partial functional can charge in C like it does with H). wish this isn't too technical....

Answer 5

Simple. The 2 atoms of H are combined with the atom of O in such a way that you can pack a large amount of these compounds in a container without becoming solid thereby transforming gas into liquid

Answer 6

The physical and chemical properties of a compound are often very different from the properties of the individual substances which make up the compound. For example, the salt we sprinkle on our food, which is essential to life, is a combination of an explosive metal and a poisonous gas.

Answer 7

The oxygen is already present in air. When hydrogen gas is burnt in air, it forms water as the only product.